Cleaning machine



Oct. 20, 1931. c, PICKER CLEANING MACHINE 7 Sheets-Sheet l lN-VEN TOR(bar/95 Picker Filed Oct. 22, 1926 5/ A TO E C. PI ER CLEANING MACHINE 7Shee ts s 2 Filed Oct. 22, 1925 TOR (barks B x er wm V Oct. 20, 1931. c.PXCKER CLEANING MACHINE Filed Oct. '7 Sheets-Sheet 3 INVENTOR (bar/e5p/cA er ATTORNEY Oct. 20, 1931. c. PICKER I CLEANING MACHINE Filed Oct.22, 1926 7 Sheets-Sheet 4 ATTORNEY Oct. 20, 1931. c. 'PICKER CLEANINGMACHINE Filed Oct. 22, 1926 '7 Sheets-Sheet 5 ATTO NEY Oct. 20, 1931. c.PICKER 1,827,905

CLEANING MACHINE Filed Oct. 22, 1926 7- Sheets-Sheet 6 C. PlCKER Oct.20, 1931.

CLEANING MACHINE 7 Sheets-Sheet '7 Filed Oct. 22, 1926 /az My /NVEN TOR[bar/e5 P/c/(er M ATTOR EY Patented Get. 2%, 1931 I i :1. earner; eee eeCHAR-LES Prensa, or ennenmnnw form V ennnnrne MACHINE Application filed(letober 22, 1928. Serial No. 143,483.

My invention relates to-cleaning machines Fig. 5 is an enlarged detailedview of the and particularly to a machine for cleaning means forregulating the squeezing of the floors. mop; .l p The primary object of.myinvention is to F'i 6 is a section in the plane '66 of 5 provide adevice of this character which F 1 I will, in a single passage over afloor surface,

not only remove and collect loose objects F1 andparticlesofdirt,butWashandcompletely 1g. 8 is an enlarged fragmentary front.

clean and dry the same. The invention conview; I

1e templates either a self-propelled machine or F ig."9 is a partialsectional detail of a '60 a manually propelled machine which, as itclutch mechanism; I V progresses over the floor, first, picks up andFlg. l0 is a viewof the clutch mechanism collects comparatively: largeobjects such as h WH 111'F1g. 9 With the parts in a' slightly cigarette.boxes, cigar butts, papers and the (llfferent P 1 1011;

like; second, sweeps and collects all smaller g- 11 1S p p c W of detailo 65 particles'ofdirt and'dust;third,m,oistens and the f h scrubs thefloor; fourth, mops and partially g- 2 an l g hh h P lh dries the floor;and fifth, completely dries T 3 E 2 h ra fi remwed; the floor. Anotherobject of my invention is 1 enlarged Sectloh h t P 6 to provide a means-whereby the cleaning 1 3 of 5 7 r I mechanism may be raised from. thefloor, 1S a Sectloh OfFlg- 12 1n the P a e l and-the device easily movedabout in any di- 5 rection'by hand. .Anotherobject of my inls afrzlgmentil'ry enlarged sect-Jon r vention is to provide, in a machineofthe 2. z fm of I Q t F general character, ameans for sprinkling the new0 the-gems shown.m floor in which a measured volume of water g fg fromthe Fight d slde is delivered over a given area, and in which v thesprinkling system is automatically cut 31515 a z to F Q h by thestoppage of the cleaning mechag 21 l erenl g g g. 1

nism. Another object of my invention is to 'if of are? Sec Ion m t e Pahe 80 provide a means for conveying the dust and 19 is *2 rtial 12mView of the 6 smaller particles of dirt swept from the floor;ii tion Owni g p v p P g fi g g fl remove r Fig. 20 is a detail of an element.shown in i b a n 19: i, in k 9 h d and other oblects my Fig. 20A is apartial section of Fig. 18 in lnvention includes the novelelements andt11ep1ane2OA 2OA. comb nations and arrangements of elements Fig 21 is anenlargedyiew in the plane described below and lllustrated 1n the accom-21 21 of p i 7 is a section in the plane 77 of l y g drawlhgs, 111 Whichr V Fig. 22 is a fragmentary enlarged view of -90 1 is a $1618 elhvahlohof y machlhe the rear end of the machine; and Yfishhlg upon the Wheels yWhich is P Fig. 23 is a section of Fig. 22 in theplane ported when movedabout; 23 23 V ig. 2 is El plan view Of my machine With Referringparticularly to .Figs. 1, 2, 3, 6 the top covers and the watertankremoved; d 7, my hi comprises a Outer ag gii Fig. 3 is a longitudinalsection of my ma- 1, which ma-y be closed at the top, if desired, chinein the broken plane 3-8 of Fig. 2; by th hinged covers, 2, but'which isopen at Fig. l is an enlarged view of a detail of the bottom.- Withinthe outer case mess. themoptighteningdevice and a partial see curedthereto by a common plate, 3, at the p tion of Fig. 3 onthe line 4l4;front of the machine and-between suitable 1% front of the machinetowards the rear as, 6, 7,

8 and 9, respectively. The whole machine is supported upon four rubbertired wheels, 10,

. attached to the transverse shaft, 25, (see mounted on axles, 11, whichmay be provided with suitable bearings (not shown) in the sides of theinnercasing, and which are provided with clutch mechanisms, 12,projecting through openings, 13, in the outer casing. The clutchmechanism is shown in detail in Figs. 9, 10 and 11 and will be describedlater.

Mounted within the inner casing, and to the rear of the tank orreservoir, 9, is the electric motor, 14, which propels the machine overthe floor. The motor, 14, turns the shaft, 15, through the bevel gears,16, and the shaft, 15, turns the worm wheel, 17 through worm, 18, whichcoacts therewith. The worm wheel,17, is mounted upon a transverse shaftwhich carries, at its other end, sprocket wheel, 19, coacting with asilent chain, 20. The connection between worm wheel, 17, and its shaftis controlled by a clutch mechanism, 12, similar in all respects to theclutch mechanism, 12, on the main wheels, 10. Fixed to the Worm wheelshaft is a corrugated rubber roller, 21, adapted to carry the endless,drying mop, 22, which moves in the direction of the arrows shown in Fig.3. The silent chain, 20, travels over sprocket wheels,'23, at the top,24, at the bottom, and a sprocket wheel Fi 3). The endless mop, 22,extends over an 'is driven-by the corrugated roller, 21, and thereafterruns downwardly and around a corrugated rubber roller, 26,- on shaft,25; thence horizontally beneath the transverse rubber rollers, '27;thence upwardly around transverse rubber rollers, 28 and 29; thencedownwardly, within tank, 8,'and about the transverse tightening roller,30; and thence upwardly between roller, 21, and the adjus able squeezingroller, 31; The pressure of the squeezing roll, 31, may be varied by thead justing means, 32, shown in detail in Fig. 5.

Referring to Fig. 5 the squeezing roll, 31, is mounted upon a shaft, 33,which is supported in bearing, 34. This bearing, 34, is provided with aI longitudinally extending member, 35, passing loosely through themembers, 36 and" 3?. The member, 36, is fixed to the longitudinal,threaded member, 38, passing loosely through the member, 37, which isriveted to the side of the case, 5, and which is provided with theadjusting nut, 39, abutting against the member,37'. EA portion of thecase, 5, about the adjusting nut, 39, is cut away and backward movementof the adjusting nut is prevented by its contact with the edge, 40, ofthe opening in the case. Spring, 41, is provided whichis compressedbetween the member, 36, and the bearing, 34. From a consideration of theforegoing it will be apparent that by turning the nut, 39, the member,38, and the member, 36, attached thereto, may be moved in a horizontaldirection so that the compression on spring, 41, is varied. Thus, thepressure'on the mop as it passes between rolls, 21 and 31, is varied.

The bearings of the shaft upon which the mop tightening roll, 30, ismounted, are carried by the vertical sliding bars, 42. These bars, 42,are adapted to slide vertically in the bearing members, 43, which aresecured to the side of the case, 5.,

Referring to Fig. 4 the rod, 42, is provided with a pin, 44, betweenwhich, and the bearing, 43, is compressed the spring, 45, tending toforce the rod, 42, downwardly, thus keeping the mop, 22, under tension.The mop, 22, is held in contact with the floor by the action of therollers, 27. These rollers are mounted upon transverse shafts runninginbearings carried by the rods, 47,. (see Fig. 7) which in turn areadapted to slide vertically in the bearings, 48, attached to th'e'sideof the case, 5. To insure that the mop will be kept in contact with thefloor, springs, 49, compressed between the bearings, 47 and the bearingsfor the rolls are provided.

The sprocket, 23, which is driven by the silent chain, 20, is secured toa transverse shaft carrying a corrugated rubber roller, 50, driving theendless mop, 51. This 'mop moves in the same direction as mop, 22, and 1is carried about themain rollers, 52, 53 and 54. The mop, 51, isprovided with a tighteningroller, 30, a squeezing roller, 31, androllers, 27',all similar to like numbered members associated with mop,22. The squeezing roller, 31, is also provided with an adjusting means,32, similar to the adjusting means, 32, for the squeezing roll, 31.

Fixed to each end of the shaft, 25, which is driven by the silent chain,20, are gears, 55, I

meshing with gears, 56, secured to shaft, '11, upon which are mountedthe rear propelling and supporting wheels.

The shaft which carries the rubber roller, 50, and is driven bysprocket, 23, carries, at

its opposite end, a sprocket, 57, driving the silent chain, 58. Theconnection between sprocket, 57, and its shaft is controlled by a clutchmechanism, 12, similar in detail to the clutch mechanism, 12, on themain wheels.

The chain, 58, extends downward, as shown in Fig. 7 and drives asprocket wheel, 59, secured to the transverse shaft, 60, (see Figs. 2and3). Secured'to each end of the shaft, 60, are the gear wheels, 61, whichmesh with thegears, 62, secured to theshaft'which carries the forwardpropelling wheels, 10. Thus, the propelling wheels,both front andrear.are driven by=the motor, 14.

the axial mountings, 90. 46

- igeeaecs (see Fig. 6). The gear, 64, drives ,the't ransverse shaft,66,. carrying the bevel gears, 67 and'68 (for details. 'see'Fig. 13).The'bevelgears, 67 and '68,'-mesh withthe pinions, 69

and 70, secured to the vertical, hollow shafts, 71 and 72, respectively.The vertical shafts, I 71 and 72, are provided with the transversebearing member, 73, at the top, and the hearing members, 74; and 75, atthe bottom. -Telescoping within the hOllOW shafts, 71 and 72, are thevertical rods, 76 and 77, respectively, which are secured to theangularly disposed scrubbing brushes, 78 and 7 9. The rods, 76 and 77,areadapted to be turned by the-shafts, 711and 72, respectively, by meansofthe screws, 80, which project through the slots, 81, as shown in theshaft, 71. The'lower part of the hollow shafts, 71 and 7 2,'are providedwith pins, 82, between which, and the tops of the brushes are compressedthe helical springs, 83. These springs tend to keep the brushes in,contact with the floor. I

The gear, 65, is mounted upon a short shaft which also carries thesprocket wheel, 84, and the bevel gear, 85, (see Fig. 12 for details).The gear, 65, meshes with the small pinion, 86, which drives therevolving brush, 87.

' This brush, as viewed-in Fig. 3, revolves in a counterclockwisedirection, is normally in contact with the floor, and brushes the dirtand dust from the floor into the transverse dustpan, 88. The dustpan,88, is pivotally mounted in the sides of case, 5, as shownin Fig. 12,and the lower edge of the-dustpan is normally kept in contact with thefloor by means of the helical springs,'89, surrounding Referringparticularly to Figs. 8, 12 and 18, the bevel gear,'85, meshes withbevel gear, 91, mounted upon the longitudinal shaft, 92, which extendsthrough the frontv end of the machine to receive gear wheel, 93; Thegear,

n 93, meshes with and drives the gear, 94, on

the forward end of the machine, and this gear drives the short-shaft,95, carrying sprocket wheel, 96. e The sprocket Wheel, 96, drives thesilent chain, 97, which carries the dust conveyors, 98. The chain, 97,also runs over sprocket wheels, 99, 100 and 101, having fixed bearings,and over sprocket wheel, 102, mounted upon a vertical movable shaft,103. The shaft, 103, may be moved up or down by means of the adjustingscrews,101 and'l05,

which are threaded through the shaft nearits extremities, thus varyingthe tension on the dust conveyor chain. a 0

The dust swept up by the revolving brush,

87, is carried up on the dustpan, 88, and falls verted at't-he top'asshown in Fig. 18. In this position the dirt falls downwardly, as shownin Fig.3, and is collected in the'drfaw-" er-like receptacle, 107,"whichmay bewith-" drawn, as shown at 107 5 ,Fig. 3,and dumped. To preventthedust frombeing thrown into the links of the conveyor chain, a thinguard plate, 200, is'provided, which is rivetedtothe; front plate, 3.The sprocket wheel, 8%, drives the silent chain, 108 which in turndrives a sprocket, 109, at the extreme front ofthe machine. Theshaft,;-1=10, to which thesprocket, 109, is, attached, drives the frontbrush 111, through the crank, 112. The dotted circles, 111, and thedotted lines, 112, in Fig. 3, indicate different :lpositions zissumedbythe brush and crank respectively. As the1nachine is 'propelledzov'er thefioor the eccen-; tri'cally mounted brush, 111, revolves, as shown, andsweeps comparatively large objects into the forward scoop or dustpan,113, whichis hingedly connected to the front of the machine as at 1141.5To prevent the scoop from catching upon projections from. the floor, itis supported on small rollers,'115, so that the front edge is raisedslightly above thefloor. Referring particularly to Figs. 2, 3 and 13, Iwill now describe the automatic sprinkler means forunoistening thelfleorafter it is swept by the revolving brush, 87 and before it is scrubbedby the brushes,'7 8 and 79.". EX tending transversely of the machine, at'a' point comparatively near the floor] and between the sweepingbrush'and the scrubbing brushes, is the perforated pipe, 116,,con-.nected tor the small receptacle, 117,"by the pipe, 1.18. J v Referringnow more particularlyto Figs. 12, 15, 16, 17,18, 19 and20, forItheparticular details, and to Figs. 2 and 3 for thegeneral assembly, theshaft, 119, which isjdriven by the dust conveyor'ehain through sprocket,100, carries the segmentalgear and cam, 120. Above, and, sli 'htly toone side of" shaft, 119, is shaft, 121, mounted parallel to shaft, 119,and carryingthe gear-wheel, 122, adaptedto mesh at certain timeswith-the segmental gear, 120. The number of teeth in the segmental gear,120, should be SLlffiClQIll? to revolve the dipper arm, 123, and dipper,12 1-.

6 through the angular distance shownrin Fig.

15. "The dipper, 124, is simply a hollow cylinder provided with anopening, 125, in the top, through which water may enter when it issubmerged, and which is connected through the hollow dipperarm, 123, tothe shaft, 121. The shaft, 121, from its extremity within thereceptacle, 117 ,to the point of connection of the dipper arm, 123, ishollow, as shown at 126,in Fig. 12 so that water may'fiow'from dipper,124, into receptacle, 117 The force 7 of gravity assisted by thehelicalspring, 127, -(see Figs. 2" and 3) tends to maintain the positionshown at125' in-Fig. 15. 1 The water from the dipper flows down thehollow arm, 123,-into the hollow shaft, 126, and out'into thereceptacle,-117, and thence throughpipe, 118, to the sprinkler, 116. Inorder that the dipper, 124, may be held in the position shown at 124 in:Fig. 15, "for a sufficient length of time to empty the water therefrom"into receptacle,' 117, Lprovide the following described means.Astheshaft, 121,- is turned, the point of screw, 1.29, coacting withthe-helical slot in thesh'aftprod'uces alongitudina'l movement of theshaft, 121, tending to laterally disengage: gears, 122 and 120.Referring to Figs. 15, 16 and 17 when the last tooth on the segmentalgear, 120, has passed out of engagement with the teeth on gear, 122, theshaft, 121, has; moved toward the front of the machine and occupies'theposition shown in Fig. 17. Here, the side-of gear, 12:2,is frictionallyengaged by the side of projecting rim, 132, ofthe-segmental gear whichholds the dipper in the position, 124 until the projectingrim, 132,'haspassed beyond the range of the side of gear, 122. To facilitate an easytransition of gear,'122, from the teeth on gear, 120, to the rim, 132,the edge of the rim, 132, adjacent the teeth is beveled, as shown at133. By withdrawing the point of screw, 129, from its engagement withthe helical slot, 131, in shaft, 121, the shaft, 121, may be pulledforwardly a sufficient distance by grasping knob, 134, topermanentlydisengage gears,120 and 122, thus throwingthe dipper out of operation. rI

Referring to Figs. 2and 7,'if for any rea: son the mechanism operatingthe. dipper should break, I providejthe valve, 135, operated by the handwheel, 136, at the front of the machine for admitting water from tank,6, tothesprinkler, 1 16, through-pipe, 137 (-see "Fig. 7).

' 'Suitablyniountedupon the top of the machineis the water storage tank,138,-havinfg a filling cap, 139, and provided, if'desired, with a gauge,140, adapted to indicate the quantity of water in the tank. Thetank,138,

i is provided with'cocks. 141, 1'42'and 143 located respectively overtanks,-6, 7 and 8.

wherebyithey' may be readilyfilled with fresh water. i V i 'Thetank, 9,is' a drainage tank through which the dirt and water -collecting-intanks,

represents either one of the axles, 11, the

shaft ofthe worm gear, 17, orthe shaft for the sprooket,;57. 4149,represents either the hub of'one; of'the rubber tired wheels, 10, thehub of the worm gear, 17, or the hub of the sprocket, 57 Looselymountedupon theend of the shaft, 148, is the manipulating button, 150. Thisbutton is hollow and is adapted to enclosethe helical spring, 151,compressed between the washer, 152, on the end of shaft. 148', and theinside of the manipul'ating'button, 150. The shaft, 148,1is providedwith the annular recess, 153. into which projects screw, 154,threadedinto the hub of the 'wheel. Thecoaction of screw, 154, andrecess, 153,prevents lateral movement of the wheel on the sha'ft-but-permits thewheel to rotate freely. The inner face of-the-manipulating button,150,is provided withtwo projections, 155 and 156. The projecti0n,-155, isadapted to coact with a complementary recess, 157, provided. in the hubof-the wheel, andthe projection, 156,-is adapted to coact either with acomparatively deep complementary recess, 158, in the shaft, (best shownin Fig. 9) or witha comparatively shallow complementary recess,l159,which is also in the shaft but spaced from recess, 158.

lVhen theparts are in the relative position shown in Fig. 9, projection,156, is meeting with recess, 159, and thewheel may beturnedindependently of the axis. When the parts are inthe relativeposition shown. in Fig. 10, projection, 155, is'coacting with recess,157, in thehub, and projection, 156,'is coacting-with recess, 158, inthe shaft thereby locki'ng the wheel and shaft together.

Referring particularly to Figs. 1, 2, 18, 21-. 22 and23, in orderthatthe cleaning mechanism may be easily raised from the floor, I providenear the front of the machine and at each-side-thereof wheels, v160 and161, and at the rear of the machinea singleyswivelmounted wheel, 162.These wheels ,may be raised andlowered by the-;n1echanis1n hereinafterdescribedandby means of which the entire 'inaohine'may be lifted oil ofthe rubber tired wheels, 10, and be supported upon the wheels, 160, 16 1162. Extending longitudinally ofthe'machine and just within the outercaseare the bars, 163, which are pivoted to the-outer case near thefront and bottom thereof as shown at-l64. Th'ese'bars wheels, 160 and161. through vertically slotted openings in the of the outer case.

extend through the slots, 165, (see Figs. 21

and 22) in the rear of the outerflcase and are connected at therear endof the machine by the bar. 166. Near the pivots, 16 1, short 'verticalbars, 167 (see Fig. 18) arepivoted to the bars, 163,- as shown at 168,and these vertical bars'carry the axles, 169, for the These axles passouter case so that as the bars, 163, are moved vertically aboutthe/pivots, 16 1, the wheels,

160 and 161, are moved accordingly.

Referring now more particularly to Figs.

21, 22 and 23, secured to the bar, 166, is a plate, 170, provided withtwo depending por- "tions,'171-, having rollers,;17 2, at their lower'ed to coact with the bolts or. latches, 176, are

the racks, 177. Secured to the U shaped bar, 17 4, at its center, isthefoot pedal, 178, which .maybe depressedv to withdraw the extremitiesof the bolts or latches fromthe racks, 177 The foot pedal, 178, isnormally held in the position shown in Figs. 22 and 23 by the tensionspring, 179, so that the latcheslare :normally held engaged with theracks, On account of the's'hape of the, rack teeth it will be obviousthat the plate, 17 0, with itsattachedparts maybe moved'downwardlywithout releasing the engagementofthe latches and racks, thus moving thebars, 163, downwardly about their pivoted extremities and lowering thewheels,'160 and 161. To raiseithe'bars, 163, it will be necessary todepressthe pedal, 178, so that the latches are disengaged from theracks.

' The rear end of the outer case, at its center, is provided with avertical slot, 180.

Resting against the outer rear side of the casin g,'and adapted to'slidevertically relative to said casing is the plate or bar, 181, to' which Tis attached thewheel,162, swiveled at 182.

bolts, 183 and 184:,which pass through'the The bar, 181, is held insliding engagement with therear end of the outer case by the rear end ofthe casing.

Pivoted to the inner rear side of'theouter casing, as shown in Figs. 21and 23 are the arms, 1851 Pivoted to the arms, 185, are the cross-arms,186, pivotally connected to- I I gether, where they cross, by the bolt,18%, and

pivotallyfconnected at the top by the tra nsverse bar, 187 It will beapparent from a reference to Fig." 21 that the bars, 163, rest upon andare normally supported by the transversebar, 187.

' When theplate, 170, is forced downwardly, it also forces thetransverse bar,'187, downwardly and this in turn forces the Wheel, 162,downwardly-by the coaction of the cross-bars, 186, and the bolt, 184.'When theparts are in the relative position shown in Figs. 22 and 23,the transverse bar,187, will be in the position indicated by 187,

the cross-bars in the position indicated by 186T,

the bars, 185, will move outwardlyto the position indicated at 185, andthe bars,-163,'

'will bemoved downwardly to the position indicated by 163.

When the parts are in the relative position shown in Figs. 22 and23,1the propelling wheels, 10, will be lifted from the floor and themachine will rest upon the outside, forward wheels, 160 and 161, and theswiveled, rear wheel, 162. It will be obvious that when the machine issupported on these wheels the cleaning mechanism is lifted from thefloor and the swiveled supporting wheel at the rear about in anydirection.

While I have shown no controlling inechanism for the electric motor, norany connect1ons therefor, it is to .be understood that such controllingmechanism and connections 'may beprovided at any convenient point. 7

In operation, my machine may be propelled over the fioorby the electricmotor which is operatively connected to the driving associated witheachwheel, ;or itfmay be propelled by hand through the handles, [188. Whenpropelled by hand,the clutches, 12, associated with the wheels, 10,,areadjusted to the position shown in "Fig;, 9,so that the wvheels,10,- mayturn freely on their axles,

In this latter case, the cleaning, mechanism 'may still be operated bythe electric motor provided the clutch, 12, associated with the wormgear, 17 is left engaged.

In. comparatively small machines or in machines ;which embody a portiononly of the cleaning mechanism disclosed in my complete device, or inother case, it may be desired to both propel the machinefand operate thecleaning mechanism by hand. In this case,

the motor may be dispensed with and the driving wheels, 10', adapted toturn the axles to which they are affixed, thusdriving the cleaningmechanism. Where it is desired to both propel and. drive the cleaningmechanism of a motor equipped machine, such as herein described, byhand, the clutches, 12, associated with the wheels, 10, may be adustedso that the wheels will drive the axles,

and the worm wheel, 17 may be disconnected from its shaft bythe clutch,12.'

As progresses,comparatively large ob jects-such cigar butts,'wads ofpaper, etc.,

are caught-= by the eccentrically mounted will permit the device to bereadily swung 9 I brush, 111, and swept into the scoop,113.

WVhere such an object is, intercepted'by the .front edge ofathe'scoopand thebrush, 111,

is; in one of the positions shown at 111,-in

Fig. 3, the object will be pushedalong the floor, by the edge ofthe-scoop until thebrush approaches the position shown in 111, whereuponthe; object will be swept into the scoop. The brush, 87, revolves atcomparatively high speed so that the fibers thereof in contact with thefloor move toward the dustpan, 88. .The dust is carried up over thedustpan and falls into the driven conveyor where it is carried upwardlyand dropped into the dirt receptacle, 107. When the dust isremoved fromthe floor by the brush, 87, the floor is in contact with the floor.

immediately sprinkled with water. It is important to note here thatwhen,for any reason the progress. of the machine is stopped,

the dipper, 12 1, will cease to operate and no water will be deliveredto the sprinkler. After the floor is sprinkled, it is thoroughlyscrubbed by the revolving brushes, 78 and 79,-which turn atcomparatively high' speed This operation loosens all dirt which may beadhering to the floor and which was not picked up bythe .7 brushes, 111and 87, but leavesthe dirty water on the-floor. Following the scrubbingproc ,ess' is thefirst mop, 51, which moves in the 7 direction of thearrow shown inFig. 3 and is held in contact with the floor-by the springdepressed roller, 27.

This-mop efiec'ts a rough drying operation absorbing most of the waterand dirt which is carried upwardly i into tank, 7. The tank, 7iskeptpartially full ofwater which washes the dirt from the mop as itpasses througlnand theexcesswater in the mop is removed by the squeezingroll, 31'. Following the first mop is the second mop, 22, whichpractically completes the drying operation,;and the dirt-collected-bythis mop is washed out and deposited in tank, 8, and the surplus waterremovedfrom the'mop by the action of thesqueezing roll, 31.

The dustpan, 88, is provided with a rather sharp lower edge, andinasmuch. as thisedge is-normally held in contact with the floor by thesprings, 90, it might be seriously damaged or even torn from themachineby any backward movement thereof. For this reason I have provided theratchet wheel, 189, (see 'Figs. .12 and 14) whichis mounted on the shaftcarrying sprocketwheel, 8 1, gear wheel,

65, and bevel gear, 85. Pivotally secured to the'sideof'the case isthepawl, 190, which is held in operative engagement with the teeth ofthe ratchet by spring, 191. The coacti'on of the pawl and ratchetwillpreventbackward movement of the machine; a

From: theforegoing it will be apparentthat I have provideda-machineiwhi'ch will, -in one passage over a given surface'of'fioorjcompletelyclean tl1esame; It'is to be under- StOQCLllOWBVGI, that I am,not limited to the dipper from the tank.

precise details herein described and illustrated in the drawings, nor toamachine per forming all of the functions herein set forth. For example,a machine having only a front scoop with an eccentrically mountedzbrushfor collecting comparatively large objects would be valuable apart fromany other elements, and the combinationaof an eccentrically mountedbrush'coacting'with scoop for collecting large objects,and a rotating brushfor collecting dust, would formar sweeping machine of some considerableValue. In otherwords, many subcombinationsof elements, described andillustrated would, in themselves, prove extremely useful. therefore tobe understood that thewords which I have used in describingimy inventionare words of description ratherjthan words of limitation, and thatchanges-within the It is purview of theappended claims may be madewithout departing from thetrue scope and spirit of my invention. i

What I claim is r 1. In a fioor cleaning machine of the characterdescribechthe combination withmeans' for collecting comparatively largeobjects and comprising a revolving brush and'means for periodicallyelevating, from and a lowering the brush to the floor, of means for 001-lecting small particles ofdirt'and comprising a revolving brush incontinuouscontact Evith the floor and behind said first mentioned rush.

2. In afioorcleaningimachine including a bination with meansforpropelling, said machine, ofasprinkler pipe adapted to spray water overthe floor, and a dipper,oscillated by the propelling means, for dippingwater from thereservoir and delivering itto the sprinkler, a .7 i 3, In.a floor cleaningmachine, the combination iwith a tank. adapteditocontain water, of a movable dipper adapted to raise water-from saidtank, a spri'nkler head com-'= reservoir adapted to contain water, thecom- 3710 tank and spaced from but communicating" with said hollow shaftthrough a hollow arm connecting the two together, agear on said hollowshaft,1fa second shafthavinga seg mental gearthereon coacting with saidfirst mentioned gear, and means for driving, said last mentioned shaftto periodically raisethe 5. In a-floor cleaning machine, the combinationwith a tank adapted to contain water, ofa-movable dipper adaptedto-raise Lil) water from said tank, and means for raising said dipper fromsaid tank; said last mentioned means including means for temporarilysustaining said dipper in raised position.

6. In a floor cleaning machine, the combination with a plurality oftanks adapted to contain Water for Washing the dirt from a plurality ofbelt mops driven through said ater, of a tank adapted to receive thedrainage from said first mentioned tanks, and a tank adapted to containa supply of fresh xiz ater for replenishing said first mentioned tanksby gravity.

CHARLES PICKER.

